文献类型：期刊文献

英文题名：Preparation, curing kinetic and properties of a novel amine with flexible polyoxypropylene side chain curing agent for epoxy resin

作者：Wang, Guiyou[1];Jiang, Guanlan[1];Zhang, Jie[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2014

卷号：589

起止页码：197

外文期刊名：THERMOCHIMICA ACTA

收录：;EI(收录号：20142517835174);WOS:【SCI-EXPANDED(收录号:WOS:000340320400025)】；

基金：This research was supported by Fuzhou Baisheng Chemical Company Limited, China. The authors wish to thank Prof. Zhiping Zhang for his assistance.

语种：英文

外文关键词：Epoxy resin; An amine with flexible polyoxypropylene side chain; Non-isothermal kinetic; Toughness; Morphology; Mechanical property

摘要：A novel amine with flexible polyoxypropylene side chain (AFPE) was synthesized and characterized with Fr-IR and NMR. Then, AFPEs with different molecular weight were used as a curing agent for diglycidyl ether of bisphenol A (DGEBA), and non-isothermal reaction was detected with DSC. The kinetic parameters of the curing process were determined by Malek method. A two-parameter (m, n) autocatalytic model (Sestak-Berggren equation) was found to be adequate to describe the reaction-controlled kinetics of the studied epoxy resins, yet was insufficient in depicting the diffusion-controlled kinetics of the epoxy resins. The values of Ea depended on the molecular weight of AFPEs, and increased with longer polyoxypropylene chain length in the AFPE. Dynamic mechanical analysis of AFPEs modified DGEBA/diethylenetriamine systems found that with the increasing molecular weight of AFPEs, relaxation temperature, beta relaxation temperature and crosslinking density decreased, while impact strength and elongation at break improved. From scanning electron microscope, tensile surfaces were rougher and sizes of cavities in the surface became larger with the increasing molecular weight of AFPEs. Our study showed that AFPE was a novel and effective toughening agent for epoxy resins. (C) 2014 Elsevier B.V. All rights reserved